Sash-lock.



D. HOYT.

SASH LOCK.

APPLICATION FILED AUG. 15. 1912.

Patented Jan. 15,

2 SHEETS-SHEE 1.

W M WM W .M "w

ATTORNEY I D. HO'YT.

- SASH LOCK.

APPLICATION FILED AU G. I5. 1912.

11 ,2358 a Patented Jan. 15, 1918.

2 SHEETS-SHEET 2.

WITNESSES.- I l/VVE/VTO z i 23y v. I WMW ATTORNEY ririTTn sTa Ts TATTTT oTTTcT.

DANIEL HOY-T, 'OF. EAST ORANGE, NEW-JERSEY, ASSIGNOIB, 0F ONE-HALFT0 THE NATIONAL LOCK WASHER GOM-PHNY, 0F NEWARK, NEW 'JERSEY, uAfiCEPOIi lEAw TION OF. NEW J-ERSEY.

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masses.

. s ecification Letters Patent.

Patented Jan. 15, Tait? Applicationfiled august 15, 1912. sesame. 715,312.

To all whom 2'27 may concern:

, Be it known that I, DANIEL "HoYna citizen of the United States,'residing inthe 'cityof East Orange, in'the county of Essex and State of New Jersey, have inventedcertain new and useful Improvements "in Sash- Locks, of which the following is a full, clear, and exact description, such as will enable others skilled in theart to'whichit pertains to make, construct, and use "the same, refer ence being had to the accompanyingdrawings, and to letters 'of 7 reference marked thereon, forming apart of this specification.

This invention relates "to new and useful improvements in that class of sash locksin whichthe sash is held in'an'y desired position in the window frame, by the engagement of cams-in the locks with metalliostrips on the window frame, said "c'ams being :released by fingerjpieces.

One of the objects of'thi'sinvention is'to provide a sash lock with but a sin'gle cam, which will be com'pact,'neat in appearance, simple and inexpensive in constructiomand which will perform'praetic'ally allthe'functions of a double cam sashlo'ck.

A further object of'this invention is to provide a sash lock which-willnotonlylock the sash in the lowered position, but one which is adapted to force the sash tightly on the window sill, thereby excluding dust and air. a

Other objects will appear from the description hereinafter ,givemand my invention consists in the combinations and arrangements of parts which will 'behereim after fully described and specifioally'defined in the appended claims.

In the drawings forming apart thereof,

Figure 1 represents a front view of a'window containing my improved sash locks'and racks.

Fig. '2 represents a horizontal "sectional view on line mac of Fig. l.

Fig. 3 represents one corner of a sash, with the sash lock attached, a portion of the rack being broken away to more clearly illustrate the detailed construction thereof.

Fig. l represents a front elevation of my improvedlock. I v

Fig. 5 represents a plan view of the metallie-strip.

Fig. 6 represents a cross-sectional View of the metallic strip taken on line fa-m of Fig- 5a 7 Fig. 7 represents a sectional side elevation of the metallic strip, and

I i'gES represents a cross-sectional view er the metallic "strip taken on line 00-a/ of Fig. 5.

Similar letters of "reference refer to "like parts' throughout the specification and'drawings.

Referring to 'the drawings A represents the sash B the window casing, and *Gthe window sill. The 'sa'sh'lock which may he secured to the window sash 'in any wellknown manner consists essentially of fthe metallic-casing aprovided with a removable cover "plate,'not shown. Y; represents a fixed p vot oraXis, and 0 represents a cam lever adapted to partially revolve on :Sflld pivot or axis 7;. The outer portion of the cam lever '0 or the part adjacent the wintlow frame Ayis providedwith an engaging 'fa'ce tl, said engaging face d bein'g locat ed below the pivot or artist, and isformed atan acute angleto theip'lane of the lever as clearlyindicated in Figs. "2 and 4 of the drawings. The lower portion of 'thejengaging face (Z is forniedwith a tooth eadapted to'engage with a slot in the'metalliestripto be'presently described. This portion of-the engagi'ng 'facemay beprovided with one or'm'ore teethas desired. I

The "engaging face (Z is "provided with a hodk shaped portion f. The top ofthe cam lever aisprovided'witha shoulder g,which is designed to contact with the upper portion of the metallic case a to limit the outward "movement of the cam lever. The casing a is "further provided with a --fixed center post h,which forms afulcrum forthe arms of "thejspiral coiled spring z', to which the removable"coverplate is secured. ()ne arm of 'thespiral-coiled spring 73 bears against the rear wall of the "casing "a" and the other arm bears agalnst the inner lower portion of the cam lever o, lten'ding at alltimesto foree the same outward and upward. The cam lever c is also'provided at "its innerend, which projects outside of the casing "a, with an integraloperating lever 'orfingerpie'ce 3', formed by widening said inner end. This s i-'p eiiis r lliprns e yflie configuration asthe fin'gerpiece 7o, whicnl js formed integral with the. metallic sea" .a. The "edgeof'the"easinganea gestthe 'd"9W casing {is provide with "an outwardly extendingguide'lgtlesig'nedtoengage'with'the 1 edge of the metallic rack, to be presently described. This guide Z is preferably formed integral with the casing and may extend the entire length of the casing or only part of the length, as desired.

at represents the metallic strips which are secured to the window casing B and setat an angle to the plane of the sash A. The metallic strip m with which the engaging face cl of the cam lever 0 engages, is provided with slots 02 on its. upper portion, while the lower portion is provided with a smooth surface 0, and near the bottom of the strip at a point adjacent the tooth e of the cam lever 0 when the sash is closed, is another slot n. These slots are formed with a shoulder p at the lower end, and the upper end of the slot is provided with a downwardly projecting hook g, to correspond with the hook-shaped portion f of the engaging face (Z of the cam lever a with which the latter is adapted to engage. The front edge of the metallic strip m is provided with .a guide or smooth portion 1'', saidsmooth portion or guide extending the entire length of the strip.

By referring to Fig. 2 of the drawings, it will be noted that the metallic strip m is set at an angle to the plane of the sash, and that between the metallic strip m and the sash A, a wide angular gap exists, the width of the mouth of this gap, together with the lateral freedom of the sash between the in side and outside stops, being sufficient to let the edge of the ordinary sash lock case enter, when the sash is being raised or lowered, thereby causing the lock case to jam in this angular gap or wedge-shaped opening, causing the upper or lower edge of the metallic casing a to catch in the slots 7b in the metallic strip, and also allowing the sash to have excessive side movement, all of which plauses a very unsatisfactory working winow. v

In order to obviate these difficulties, I form the edge of the metallic strip, next to the sash lock with a smooth portion 1', and also provide the casing 05 with an outwardly extending guide Z, designed to engage with the smooth portion of the metallic strip, when the sash is pushed out against the outside stops, at which position of the sash the mouth of the angular gap is at its maximum width, thereby preventing the. lock casing from entering the angular gap, and at the same'time, providing accurate guiding means for the sash. In assembling the metallic strips and locks on the window, I first secure the metallic strips m to the inside sash stops at an angle tothe face of the sash as shown in Fig. 2, with the smooth portion 1' of the strip extending to or slightly above the face of the stops of the window frame; j

The sash is then set squarelyv in the window frame, so that neither side edge thereof will contact with the window frame at the bottom ofthe guide-ways as clearly shown in Fig. 2; the locks are then securedto the sash, one near the lower right-hand corner and the other near the lower left-hand corner, with the guide Z on the lock casing a in close proximity to the guide or smooth portion 1" of the metallic strip at, thus forming guides to maintain the sash centrally in the window frame.

The lock should be placed in such a position on the sash tha't'thetooth e of the cam lever will enter the'slot a in the metallic strip, and be forced up, so that the hoolishaped portion f of thecain lever will engagewith the downwardly projecting hook g ofthe metallic strip at by the force of the spiral coiled spring 2', and; assa-id spring is constantly forcing the tooth c with its hook-shaped portion 7 upward, itwill simultaneously force the sash downward on the window sill, thereby forming a tight joint between thelower edge of the sash and the sill. V

When the finger pieces j are compressed, the engaging faces (Z of the cam levers c are drawn within the lock casing a, and the sash is free tobe raised or lowered, When the sash is to be held in elevated position, the finger pieces are released, and the tooth c enters one of the slots at and the weight of the sashwill cause it to move in the closing.

direction until the under side of the tooth e on the canrengages the shoulder 79 at the bottom of the slot on, the weight of the sash causing the cam to rotate and wedge itself firmly against the rack. The heavier the sash the tighter it will wedge or lock the cam in engagement withthe rack. The force of a spring is not required for the locking action to maintain the sash in elevated position, the spring simply serving, under theseconditions, to throw the tooth e promptly into the slot of the rack, If any attempt is made to raisethe sash without first compressing the fingerpieces, the hook shaped portion f of the cam leverwill engage the downwardly projecting hook g of the metallic strip, thereby preventing. the sash from being further raised without compressing the finger pieces. When the sash is near its closed position, as indicatedin Fig. 1 of the drawings, the engaging faces (Z of the cam levers 0 only bear against the smooth surfaces 0 of the metallic strips m, and then only act as brakes, but will allow the sash to settle down upon the window sill until. the hook-shaped portions f enter the lower slots in the metallic strips, when they wliil constantly crowd the sash down on the s1 Inasmuch as the metallic strips are placed at an angle to theplane of the sash,and inasmuch as the engaging faces of the, cams are formed at a corresponding angle, the tendency is to force the sash outward against the outside stops, making a tight joint, eX- eluding air and dust, preventing lateral movement of the sash and also preventing rattling thereof.

While I have shown my preferred form, it will be understood that many changes may he made without departing from the spirit and scope of my invention, as for instance, the slots in the metallic strip may be arranged closer or farther apart, or if a balance is used for the sash, slots might be dispensed with, except such as are necessary to lock the sash down. The metallic strip may be made in any form, and may be set squarely on the window frame, as shown in Fig. 3 of the drawings.

I claim:

1. In combination with a window frame, a sill, a sash provided with means for positively locking it in its closed position, and a spring acting through the locking means to continuously press said sash yieldingly upon said sill.

2. In combination with a window frame, a gravity sash freely slidable therein and constructed to rest by gravity in contact with the window sill, a metallic strip secured to the window frame and having a downwardly projecting hook-shaped member extending at right angles to the length of said strip, a sash lock secured to the sash and having a lever carrying an upward hook-shaped member, and a spring to force the hook and the lever outward and upward in engagement with the hook on the said strip to hold the sash down in contact with the window sill, said hook-shaped member continuously engaging said hook on the strip while the sash contacts the window sill.

3. The combination with a window frame and window sill, a gravity sash adapted to slide freely therein, a metallic strip secured to the window frame, said rack having a smooth unbroken plane face and a single socket near the lower end of the'strip, said socket having an upper wall formed at right angles to the length of the rack, said top wall being undercut forming a downwardly inclined hook-shaped member, a sash lock secured to the sash comprising a case having an integral finger piece, a pivot post within the case, a cam lever pivoted on the post, said cam lever having a head adapted to engage the smooth portion of the rack and to act as a cam friction brake on the smooth portion of the rack during descent of the sash by gravity, a spring within the case to force the engaging portions of the cam lever into engagement with the unbroken plane face of the rack, the engaging portion of the cam lever and the pivot of the latter being so arranged that said engaging portion is held in strong frictional engagement with said face of the rack by the weight of the sash, and means formed on said cam lever to engage the upper wall of the socket in the rack whereby the action of the spring on said lever forces the sash downward on the window sill.

4. The combination with a window frame, a sash adapted to slide therein, metallic racks secured to the window frame at an acute angle to the plane of the sash and having sockets formed therein, said sockets having upper and lower walls formed at rightangles to the length of the rack and a back wall between the upper and lower walls of the sockets, said sockets being open at one end, said rack being further provided with a continuous guide surface the entire length of one edge and closing .one end of each of the slots, a sash lock secured to each side of the sash, each lock comprising a case having an integral finger piece, a cam lever pivoted within each case, one portion projecting from the case forming a finger piece, another portion having an engaging head formed at an acute angle to the plane of the lever adapted to engage the face of the rack or back wall between the sockets, said head being provided with a locking tooth below the pivot adapted to engage the lower wall of the socket to lock the sash against falling, the case of each lock being further provided with a guide extending laterally from the case and along one edge thereof adapted to engage the guide surface of each rack by which means the sash is maintained central in the window frame, and preventing the lock case from catching on the sockets in the rack, and a spring within the case to actuate the cam lever.

5. In combination with a window frame, a sash adapted to slide therein, a metallic strip secured to the window frame and having a downwardly projecting hook-shaped member extending at right angles to the length of the strip, a sash lock secured to the sash having a lever carrying an upward hook-shaped member, and. a spring to force the hook of the lever outward and upward in engagement with the hook on the strip, whereby the sash is held yieldingly down on the window sill.

This specification signed and witnessed this 8th day of August, 1912.

DANIEL HOYT.

Witnesses Fnnon C. Frscnnn, CLIFFORD A. ALLIsTON.

Gopies at this patent may he obtained for five cents each, by addressing the Commissioner of Patents, Washington. D, C.

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